How much energy is require to increase the temperature of 1kg of a substance by 1 degree celcius

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What is the equation concerning SHC?

Energy transferred = mass * SHC * temperature change

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Why do heat graphs have parts which are flat?

Because the substance is changing state so the energy is being used elsewhere

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Define: Specific latent heat

The amount of energy required to change the state of 1kg of a substance

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What is the equation concerning SLH?

E = m * SLH

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Briefly explain conduction in terms of particles

When particles gain heat energy they vibrate and collide with neighbouring particles transferring some energy to them.

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Why are metals very good conducters?

Delocalised electrons are free to move through solid transferring E to different areas more rapidly

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Briefly explain convection in terms of particles

When particles, in a gas or liquid, gain energy gain energy they become less dense and particles with less energy are denser so they fall, when particles rise and enter a cool area they lose energy and fall creating a convection current

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Which spectrum of electromagnetic wave is used to transfer heat energy by radiation?

Infrared waves

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Are objects that are black good or bad emitters/absorbers of heat radiation?

Good

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Are objects that are white good or bad emitters/absorbers of heat radiation?

Bad

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How does food get cooked in a microwave?

Microwaves penetrate roughly 1cm into the food and transfer energy to the fat and molecules which then cook the food via convection currents

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How does food get cooked in a conventional oven?

Infrared waves transfer energy to surface molecules which then transfer heat via conduction to the rest of the food